Overedge sewing machine construction



May 5, 1953 N. L. WALLENBERG ET AL 2,637,291

OVEREDGE SEWING MACHINE CONSTRUCTION Filed Jan. 24, 1949 11 Sheets-Sheet l NED L.WALLE"NBER6 3y ALBERT 'MSCHWEDA I ALT/$152247 O i f w q N M Q g N m a i I r-- Q I l g 5 2 3 h O l N 8 a 8 @N a I "2 k :3 a Q INVENTORS. ET.

11 Sheets-Sheet 2 INVENTORS. NED L. WALLENBERG ALBERT M. SCHWEDA ATTUHNE N. L. WALLENBERG ETAL OVEREDGE SEWING MACHINE CONSTRUCTION May 5, 1953 Filed Jan. 24, 1949 May 5, 1953 N. WALLENBERG ET AL 2,537,291

OVEREDGE SEWING MACHINE CONSTRUCTION Filed Jan. 24, 1949 11 Sheets-Sheet 3 I g Q INVENTORS. LL NED L. WALLENBERG BY ALBERT M. SCHWEDA fiTTUEAZ May 5, 1953 N. L. WALLENBERG ET AL 2,637,291

OVEREDGE SEWING MACHINE CONSTRUCTION Filed Jan. 24, 1949 11 Sheets-Sheet 4 IN VEN TORS.

' NED L. WALLENBERG BY ALBERT M. SCHWEDA ATTORNEY.

May 5, 1953 N. WALLENBERG ET AL 2,637,291

OVEREDGE SEWING MACHINE CONSTRUCTION Filed Jan. 24, 1949 1 Sheets-Sheet 5 S? LL INVENTORS. NED L. WALLENBERG BY ALBERT M. SCHWEDA A TTUENEY May 5, 1953 N. L. WALLENBERG ET AL 2,637,291

CHINE CONSTRUCT ed Jan. 24, 1949 ll Sheets-Sheet 6 INVENTORS. NED L. WALLENBERG y ALBERT M. $CHWEDA 7% AYTUENE May 5, 1953 N. L. WALLENBERG ET AL 2,637,291

OVEREDGE SEWING MACHINE CONSTRUCTION Filed Jan. 24, 1949 11 Sheets-Sheet 7 FIG. 7

INVENTORS. NED L. WALLENBERG y ALBERT M. SCHWEDA .ATTUHNEY y 1953 N. L. WALLENBERG ET AL 2,637,291

OVEREDGE SEWING MACHINE CONSTRUCTION Filed Jan. 24, 1949 11 Sheets-Sheet 8 IN VEN TORS. NED L. WALLENBERG y ALBERT M. SCHWEDA ATTUEAZEY May 5, 1953 N. 1... WALLENBERG ETAL 2,637,291

OVEREDGE SEWING MACHINE CONSTRUCTION Filed Jan. 24, 1949 11 Sheets-Sheet 9 y ALBERT M. SCHWEDA fad w I A TQE May 5, 1953 N. L. WALLENBERG ET AL 2,637,291

OVEREDGE SEWING MACHINE CONSTRUCTION Filed Jan. 24, 1949 11 Sheets-Sheet l0 INVENTORS NED L. WALLENBERG ALBERT M. SCHWEDA BY 7; c

ATTORNEY May 5, 1953 N. WALLENBERG ET AL 2,637,291

OVEREDGE SEWING MACHINE CONSTRUCTION Filed Jan. 24, 1949 11 Sheets-Sheet ll INVENTORS NED L. WALLENBERG BY ALBERT M. SCHWEDA ATTUEZYE'Y Patented May 5, 1953 oVEncnoE SEWING MACHINE QONSTRUCTION Ned L. Wallenberg and Albert M. Schweda, Chi- ,cago, "111;, assignors to Unionfipecial Machine fiompanygChicago, 111., a corporation of Illinois Application January 24, 1951 9 Serial No. 72,31 2

1 This invention relates to sewing machines of the overedge' type adapted to provide either a two-thread or a three-thread stitch at andaround the edge of work advanced along a fiatsu'pporting' surface.

Machines of the foregoing character have heretofore been of two major typesfi. e., of the straight needle type having 'arectilinearly m0vavle needle bar and of the curved needle type having a needle carrier that "is oscillated about anaxis transverse tothe line of stitch formation. The straight needle type is generally recognized as bestunited for the stitching of relatively heavy work while the curvedneedle type is considered best suited for the stitching of relatively light fabrics.

'A primary object of thepresent invention has been to provide a construction which may be readily adapted for either a straight needle or a curved needle. Toward this end a special frame has been devised which is readily separable along horizontal plane to divide the sameinto two major'cornponen'ts, i. e. a lower or base member and an upper needle carrying member.

Moreover, the arrangement is such that a s'ingle base member is adapted to be conhectedwith either an upper member having'a reciprocating straight needle or one having an "oscillating curved needle carrying arm. This enables the user of v the machine to employ interchangeabh at different times, clepending upon the character of the work. to 'be'peri'orated, the desir'ed'tvpe of upper member. It also enables the manufacturer to" reduce production costs since the base members may beproducedinlarger quantities for assembly with the'seiected upper member.

In attaining the foregoing purposes 'a feature of'jthefnevwmachine is the provision of a *base member which isseparalile from'the upper member along a plane below the leveloi the work support.

' A further novel feature of the invention is the provision of a rotary shaft in the base member of the character indicated which servestodrive certain'stitch formingand wort: feeding devices carried by said "member.

Another novel feature is the provision of at least one rock shaft in the upper member of the machine'connectedior operationby the rotary interchangeable use of the base member with either-oi the'types of upper member hereinabove 10 Claims. (Cl. 112 1s2.)

Other objects, featuresand advantages of the invention will'appear from the detailed description of an'illustrative form of the invention which will now be given in conjunction with the accompany'ing drawings, in which:

Fig. 1 is a' vertical section taken along the axis of the main driving shaft of a machine, made 'in accordance with the invention, equipped with "a curved needle;

Fig. 2 is a horizontal section through the machine, taken along the line"2-2 of Fig. 1;

Fig. 3 is a transverse vertical section through the machine along the line 3- -3 of Fig. 1;

Fig. 4 is a front elevational view of the machine with a partof a front cover member broken away;

Fig. 5 is a front .elevational view, with parts broken away, showing the machine with a different upper structure having a reciprocatory, straightneedle;

Fig. 6 is atop plan view of the machine as shown in Fig. 5;

Fig. 7 is an end elevational view of the machine as seen from th'c'right end of Fig. 5;

Fig. '8 is an end 'elevational view of the machine as seen from the left end of Fig. 5, with a cover member removed from the needle head of the machine;

Fig.9 is a vertical sectional view through the machine as shown inFig. 5, taken along the axis of the main driving" shaft;

' Fig. l0 is a horizontal sectional view taken along the line H'!'Hl of Fig. 9; and

' Fig; 11 is a partial vertical section taken along the line II-II ofFi 10.

3 Referring now to Figs. 1 to 4 of the drawings. there is illustrated a curved needle overedge sewing machine of the type more fully disclosed in the pending application of Ned L. Wallenberg andGeorge Sauer, Serial No. 63,924 filed December 7, 1948. For further details as to the construction andoperation of the machine, reference may be had to said pendingapplication.

The illustrative machine comprises a frame for supporting the operating mechanism and for largely enclosing the parts requiring lubrication. Thi's frame includes a base plate It on whichis mounted a lower member ll of the vertical wall structure. A. suitable gasket is preferably provided between the base plate Ill and the lower edge of the member H. Parts it and H may together be considered the base portion of the machine. Above the member 1! a second vertical wall member 12 is provided, this being separable from the lower member along the line 13 (Fig. 1E) "This'line of separation, as will be seen, is

somewhat below the work supporting surface of the machine so that certain parts may be supported by the upper member at points below said surface. Members ll and l2 are secured to gether by screws [4 (Figs. 2 and 3) which pass upwardly through laterally extending flange portions of the two members. A top closure mem ber I5 is provided above the upper edge of the member I 2 and the juncture between these members is sealed by a suitable gasket I 6. Screws (not shown) may be provided for retaining the top IS on the member l2. As will be seen, the parts I0, I I, I2 and I5 serve to provide an enclosed chamber adapted to retain lubricant ll which, as will later appear, is automatically di tributed through the housing for the lubrication of the moving parts. An extension [8 at the left end of the member I l provides a further, substantially enclosed chamber surrounding certain of the stitch forming devices and work feeding means. A. bracket l9 carried by the extension l8 provides a part of the enclosure for the left end of this second chamber. A work supporting plate 20, which as explained in said pending Wallenberg, et al. application is pivotally mounted upon a vertical axis, may be swung either into its active position shown in Fig. l or into an inactive position in which access is provided to certain of the stitch forming and work feeding devices.

A main driving shaft 2! passes horizontally through the enclosed chamber of the machine and extends beyond each end, as shown in Fig. 1. At its right end the shaft carries a combined handwheel and pulley 22. The shaft is iournalled at this end in needle bearings 23 carried by a sleeve 24 fitted in an opening in the wall of member H and having a radially extending f ange 2'5 adapted to receive screws 25 for securing the sleeve to the frame. Adjacent its opposite end the shaft 2| is journalled in a split bushing 21 held in assembled relation by means of a sleeve or ferrule 28. Bushing 2'! is of such a dia eter that it enables the introduction of the shaft into the frame from the left in Fig. 1.

Shaft 2| is provided with a series of eccentric or crank portions adapted for connection with the various devices to be driven. One of these crank portions is surrounded by a strap 29 having an integrally connected pitman 3?] which is pivotally attached to a split sleeve 3| c amped to the inner end of a rock shaft 32. This shaft is journalled in needle bearings 33 and 34 mounted in an opening extend ng thro gh a boss formed on the upper member 12 of the frame. To the outer end of the shaft 32 there is secured an arm 35 which carries a curved need e 3'5. It will be noted that the a is of the shaft 32 is only slightly below the work sup orting surface 20, so that as the shaft is roc ed upon he rotat on of shaft 2| the needle Will be carried into the work along a substant ally vertical l ne.

Cooperating with the needle is an un er loo er and an overedge loo er. A spherical crank portion 31 on the shaft 2! cooperates ith a strap 38 at the u er end of a pitman 38. the lo er end of which carries a strap 4!! cooperat ng w th a ball-pin 4| mo nted in a ro k arm 42. The latter, as more clearly shown in the pending Wallenberg, et a1. application. is mounted on a transversely extending s aft 4-3 (Fi s. 1 and 4 which, at its forward end carries an un er looper 43a (Figs. 2 and 4). Another spherical crank portion 44 of the shaft 21 cooperates th a strap 45 at the upper end of a pitman 46 havin at its lower end a strap 41 cooperating with a ball pin projecting from a shaft 48. The latter, through the connections more fully disclosed in said pending Wallenberg, et a1. application, serves to drive an overedge looper 48a (Figs. 2 and 4). This looper is pivotally connected at its lower end with an arm 48b, secured to the shaft 48, and at an intermediate point with a rock arm 480. The details of the stitch forming mechanism are more fully disclosed in said pending Wallenberg, et al. application.

The devices for feeding the work in relation to the stitch forming means are driven by a spherical eccentric portion 49 of the shaft 21 which cooperates with a strap 50 at the forward end of a pitman 5|. The other end of the latter is connected by a strap 52 with the ball portion (not shown) of a pin 53 adjustably secured in an arcuate slot 54 formed in an arm 55 secured to a rock shaft 56. This extends parallel with the shaft 2! and is journalled at its right end in a sleeve 5'! carried by a lug or web integral with the frame and is journalled at its left end in a sleeve 58 mounted in a boss at this end of the frame. A vertically disposed feed rocker 59 is secured to the shaft 55 adjacent its left end. This rocker is bifurcated at its upper end to provide bearing members 59 and 60 for a stud 6| to which is secured a sleeve 62 formed at the rearward end of a feed bar 63. At its forward end the feed bar carries a feed dog 65 which is given a e-motion movement to advance the work. An auxiliary feed dog 66 is given a differential feed movement in relation to the main feed dog. This auxiliary feed dog is carried by a bar 61 secured to a rod 68 slidably mounted in spaced bearings 69 and 10 provided on the feed bar 63. Intermediate the bearings 69 and 10 there is secured to the rod 68 a block H having an outwardly project ng pin 12 to which is connected the forward end of a link 13. At its opposite end this link is connected with a stud M capable of adjustment in an arcuate slot provided in a plate 15 secured to or formed integral with the feed rocker. By varying the position of the stud 14 in the plate 15 the auxiliary feed dog may be given either greater or smaller movements than the main feed dog. Lifting and lowering movements are imparted to the feed dogs by an eccentric portion 16 at the left end of the shaft 2| (Fig. 1). This eccentric portion cooperates with blocks 11 slidable longitudinally on the feed bar but held against vertical movement in rela tion thereto.

A presser foot 11a (Fig. 4) carried by a vertirally slidable bar 1Tb, mounted in a head at the end of an arm 'l'lc extending from the upper frame member l2 to a point over the stitching point, is urged downwardly against the work support by a spring 'l'ld to cooperate with the feed do in advancing the work.

M ans are also provided for trimming the edge of the work in advance of the stitch forming means. For this purpose a strap 18 at the lower end of a pitman l9 cooperates with a crank or eccentric portion of the sha t 2|. At its upper end the pitp'lan carries a strap which coopera es with a ball pin 8| extending from an arm 82 (Figs 2 and 3). This arm has a hub at its oprosite end in the form of a split sleeve 83 clamped about a rock sha t 84 .iournalled in needle bearin s 3 and 85 which are mounted in an opening extend ng through the left hand wall of the me b r 12 of the frame. Shaft 84 is parallel with and adiacent the shaft 32. as shown in Figs. 2 an 3. At its outer end, shaft 84 has secured thereto an arm 81 which carries a movable trim- Tiirningnowto-Ffigs. 5 to 11 inclusive, :thereis shown astraieht needle type, of overedgerhav- .ing the same construction asthe machine of Figs. 1. toll. in its lower portionh but having a diflerent ,topgconstruction. It, comprises "a frame vhaving fa'ba se. plate fl'il secur'ed in any suitable Way to a .lowerframe member I9I. A,-gasket may suitably be employed to-gefiiactatight seal between these parts. An' extension Ma (Rigs. S:and:,.9) of the lower frame member has an uowardly extending partfilb', provided with a lug ,ilIc on which is pivotally mounted a work suoportihg: member ,9Id. Anupper vframe member .92, separable; from the lowermember lonethelinest (Figs. 5,9, and 11) is secured to, the lower .mernber by ireansof, a series of screWs M '(Figllly ;A gasket,may,, if desired, be provided between themernhjers 9I and 92. Member 9241's provided with a-shortshori- -Zontallyl extending, overhanging arm .95 having a partit on "96 's'eparatinq themain enclosure of the machine from-aneedlehead nortion'a'l. The latter is closed atits outer end by aremovable cover ,H'Ia :(Figs. 5 and 9).

fl-Avmaindrive shaft; 93 is providedinthe member -:92. shaft\iixte dsaloneitudinally ofithe overhan ing arm gfrorn a point exterior-of the frame to a point withinthe needlehead. ,Acom- .bined handwheel a d roller 99 is semi-fed to the outer end ,of theshaft for driving .thesarne. Shaft ilt is. iour alled [adjacent tthe pulley in needle bearings'lllil carried by abearngsleeve 'HH havinga radially extendin flan e I!!2,, se-

cured by screws I03 to the wall of the 'memberj92. In the partition 86, a pair of needle bearings I04 is provided for journallingthe opposite end of L theshaft 98 adjacent the needle head. The

shaft carries a balanced crank I105 connectedby link Hit With aioin lli'lprojecting laterally' irom the needle bar it. The latter is mountedior longitud nalreciprocation in abearingsleeye'Ilm mounted'in thebottom' of the needle head.

needle Hi2 is secured to the needle barand-Iis recibrocated by the latter to-and through-the work supnort for the'formationof-stitehes' -As bestshown Fig.8, the needlebar is inclinedat .a small angle, of say to the vertical'to {1cooperate advanta eously withthe under looper .andoveredge'loooer to be hereinafter described. Secured to the link "IIJE' is a thread take un-arm III arranged to'cooperatewith afixe d guide I I2 and a thread tensoning device II3-for controlline theneedle thread.

Also mounted in theneedle head'is a presser bar I I 4 adaptedfor longitudinal reciprocation 'in grooves provided at the top and hottoni portions b upresser foot -I I 5::which is: connected wi ththe bar by the; urea) a rock shaft :52. To the forward end ,of'wthe shaft 552 is secured dapteditooro k ;,ab0ut ,iaok'nifel ed I I1. vr

the screw.

Lifting of the presser bar, torelease the work and ,permitlthe introduction of new work is brou ht about by an arm I23 secured to a rock shaft -I 24.-.mounted in a rearwardly'extending lug 125cm.theneedlehead. Arm I23 extends bevn eatlr ia pin-[2E projecting laterally from the presser bar and, through the latter, serves to lift the presser bar-when the arm is rocked counterclockwise (Fig.3). .Anarm I2! at'the onposite endofshaft I 24 has an eye I28 at its outer end adapted to be ,Conn'ectedby a rod or chain with a foot treadle oruthe' ilike for rocking the shaft .and.,the arm I23 to lift the presser bar.

This lifting mechanism is normally held in inactive position by means of a spring I29 which urges arm [23' and the connected parts in a clockwise direction until the upper end of a slot use en- 31in IBI on thelug I25.

HWithinthe enclosed housing-of t eframe there secured to the shaft,,98 a gear I32, this having a hub which is fastened by screws I38 to the shaft. lvleshing with gear IE2 is an idlergear I3 mounted for free rotation on a stationary shaft it A gear I35, havingua hub secured by screws [35a to a shaft I31 inlthe lower portion of the machine meshes with the idler gear I34 and ,is rotatedtherebv. Shaft I3! is journalled in needle bearings I38 carried by a sleeve I39 havjugv a ra iallmextending flan e Mil secured by screw MI to the right well of the lower member SI (Fig 9). Adiacent its oboosite end the shaft it? is gio u'nal ed in abushingldfi which is of isnlit, con truction and retained in assembled reon' bv ag le elor ferrule I 44. A screw Hider E-e lilif servesto retain the ferrule and bushing a in rotation. Just'to the rightoif the bushing Hi3 shaft I31 isprovided with a spherical crank portion Hi5 cooperating with ,al stnap M5; at the upper end ofpitman Ml tbelower end of which is con- (Figs. 9,,l0. and 11.) Arm I e h 7 l ly, as shown in 11, and is pro- M ed atitsjlldlwith a hub I5! secured by screws (Fists. 5 9.)

anvnrlerlooper itifliFig; 5).

,of thebushine M3 (Fig.9) there idanothe'r spherical cranlr portion Hit of the shaft ii-3'? whichc'o operates with a strap I at the ,uppe1ge nd or pitman whose lower end is tend v ly from a rock shaft I58. This roe shaft, as shown in Fig. 5 carries at its forward. end an arm i532 oivotallyconnected with the lower endof a substantially i..-shaped overeege looner I69. At the elbow of this looper it is nivota y ccnnecte'd by a'stud 65 with an arm Iriiz'adanted tob'e rocked about a pivot I53. It will 'beiunderstood that the driving connections are suchthatthe needle and the two loopers are oreratedin properly t med relation to form an overe'dge-stitch. When this is or" thethree-thread type, the underlooper -passes its thread through the needle thread loop as the needle projects downwardly through the work, and subsequently the overedge looper passes its thread through the loop of the under-looper thread and carries it over the edge of the work to a point in the path of the needle, as shown in Fig. 5. Upon the subsequent downward movement of the needle its thread is carried through the loop of the overedge thread and the stitch is completed. Suitable thread controls are provided for insuring the formation of the desired type of stitch. If a two-thread stitch is desired, the overedge looper may be in the form of a spreader instead of a thread carrying member and this will carry the loop of the underlooper thread around and over the edge of the work into the path of the needle. This, of course, applies to the curved needle construction as well as the straight needle construction.

Returning to Fig. 9, another eccentric or crank portion of the shaft I31 cooperates with a strap I64 at the lower end of a pitman I65 which has a strap I66 at its upper end surrounding a pin I61 extending laterally from an arm I68. The latter has a split hub I69 which is clamped to a rock shaft I10 journalled in needle bearings HI and I12 in a boss carried by the upper member 92 of the frame. Shaft I10 corresponds with shaft 84 of Fig. 2 and has its axis below the work supporting surface. An arm I 13 secured to the outer end of the shaft I10 extends forwardly in a substantially horizontal direction (Fig. 8) and carries at its forward end a head I14 to which is secured, by means of a screw and collar I 15 (Figs. and 8) a blade I16. The latter is of inverted L-shape in cross-section and is adjustable longitudinally to bring it into proper cooperation with a stationary trimmer blade I11 carried by the base member 9I. For further details as to the construction and operation of the trimmer mechanism reference may be had to said pending Wallenberg, et a1. application.

. Adjacent the gear I39 a spherical eccentric portion I18 is provided on the shaft I31. This cooperates with a strap I19 at the forward end of a pitman I80 having a strap at its other end cooperating with a ball pin I 8I which may be set in any desired position along an arcuate slot I82 in an arm I83 secured to a rock shaft I84 (Figs. and 11). Shaft I84 has secured thereto, adja/cent its opposite end, a feed rocker I85 having upstanding bearing lugs I86 and I81 in which is journalled a stud I88. Secured to the latter between the upstanding lugs is the hub I89 of a feed bar I90. The latter at its forward end carries a feed dog I9I. An auxiliary feed dog I92 secured to an arm I93 is carried by a slide rod I94 mounted in laterally projecting lugs I 95 and I 95 of the feed bar. Intermediate these lugs there is secured to the rod I 94 a block I91 having a laterally extending pin connected by a link I98 with a bolt I99 adjustably mounted in an arcuate slot (not shown) in a plate 200 integral with the lug I81 of the feed rocker. By appropriate adjustment of the bolt I99 in the plate 200 the stroke of the auxiliary feed dog may be varied to make it either greater or less than that of the main feed dog I9I. Lifting and lowering movements are imparted to the feed dogs by an eccentric or crank portion ZllI at the left end of the shaft I31 (Fig. 9) which cooperates with blocks 292 carried by .the feed bar. These blocks are slidable longitudinally of the feed bar, but are retained against transverse vertical and horizontal movement with respect thereto.

Various auxiliary devices, such as tread tensioning, guiding and controlling means, means for delivering lubricant to various points outside of the main enclosed chamber, and the like are, of course, provided. Since the details of these form no part of the invention to be claimed herein, they need not be further described. They may be of any suitable and known form.

It will be noted that the lower portion of the machine illustrated in Figs. 5 to 11 inclusive, is identical with that of the machine illustrated in Figs. 1 to 4 inclusive, except for the omission of a few parts and the addition of several parts. For example, the needle carrying rock shaft and the operating means therefor, provided in the machine of Figs. '1 to 4 are omitted from the machine of Figs. 5 to 11. The gear I36 on the other hand, provided in the machine of Figs. 5 to 11 inclusive, is omitted from the machine of Figs. 1 to 4. It will be understood that these parts may, if desired, be provided in the lower portion of the machine, regardless of the type of upper structure employed, and they may simply be left idle when the selected upper structure has no need for them. The substitution of one upper structure for the other may be readily effected by simply disconnecting and reconnecting the pitman serving to drive the rock shafts for the movable trimmer element and the curved needle and by disconnecting the applied upper frame member from the lower frame member, through the removal of the screws (I4 or 94) and the substitution of the other upper frame member. The driving pulley and handwheel is preferably also shifted although, if desired, it may be left on the lower rotary shaft regardless of the upper frame member employed. Thus a single base structure may be readily used interchangeably with either a curved needle or a reciprocating, straight needle upper structure.

While an illustrative form of the invention has been disclosed in considerable detail, it will be understood that various changes may be made 1 in the construction and arrangement of the various parts without departing from the general principles and scope of the invention.

What we claim is:

1. An overedge sewing machine structure comprising a base having a rotary operating shaft, means carried by said base providing a horizontal work supporting surface, work performing means in said base comprising a feed dog, an overedge looper, and an under looper, said overedge looper and said under looper being mounted for movement in parallel closely spaced planes, connections from said shaft for operating all of said work performing means, said base being adapted for selective connection with any one of a plurality of upper frame members of different form, the selected upper frame member being connected with said base and having needle supporting and operating means adapted to cooperate with said work performing means to form a seam, the needle support in said connected member being arranged for reciprocation in a plane perpendicular to said horizontal work supporting surface, said connected upper frame members and said base being separable along a plane substantially below said work supporting surface, means for connecting the selected upper frame member to said base and 7 connected upper frame member for operation til-eastassessments wits-Sawwesterners erforming means'in'said-base compiising afeed dog, an overe'dge iqop r; and anj under loopei', connections from said'fshaft for "operating all "off said work performing means, saidfibase being" adapted forselective: QQlllTlBQtiOlfiiWilbhj anyone 'of ers ofidiif'e rentf thief drivingeoiifn' 'cti as from" said shaft to- "said V sa n ed s m. port, means for cohnectingf the" selected up er work performing" means a frame mem er with said' base, power receiving" means exterior of said chamber arranged for either direct or indirect connection with-said" rotary shaft; means; for connecting said power rc-iceivingf meal'nsfwith said shaft, and meaxisffor inter-connecting s shaft witlrthe needle" sup= porting and operating" means 'of the connected upper frame memberf for operation" thereof "in co ordination: with said work performing means;

3i An overedge'sewing machine havinga frame comprising a "base portion with a work support in'g surface at its top, a secondfportion extend ing "upwardly 'fifo'mftheibase and an arm extend? ingflaterallyi'fromsaidsecond portion over said work supportingsurfa'c'e, said "base portion" and second portion having" inter 'commu nicating' cavities-forming?" an" enclosed chamber,- said frame beingd'ix ided intc )sections a'longfa horrzontal planef'passing through said base portion substantially below said work" supporting; surface, means" for securing" the sections of said frame together to" form? a unitary? structure, a' rock shaft carried by theupper" section of said frame and disposed at least in part below said work supportingsurfacef'etige trimming means carried*by'said roclishaft and operating upon said, work substantially, normal to the plane of said work supporting surface, needle supporting and operating-means mounted in the'upper section of said frame, and complementary stitch forminga means for producing an overedge'seamand operating devicestherefor mounted in thelower section :of said frame. H

4 nn pver'edge sewing machine having a frame comprising a base portion with a work supporting surface at its top, a second portion extending upwardly from the base and an arm extending laterally from said second portion over said work supporting surface, said base portion and second portion having inter-communicating cavities forming an enclosed chamber, said frame being divided into sections along a horizontal plane passing through said base portion substantially below said work supporting surface, means for securing the sections of said frame together to form a unitary structure, needle supporting and operating means mounted in the upper section of said frame, complementary stitch forming means for producing an overedge seam and operating devices therefor mounted in the lower section of said frame, means including a rotary operating shaft in said lower section of the frame for driving said operating devices, a

Mo r-semis pris nga'base'having afjmairfrotary shaft, work ed on said base" portion; sai'd"base" portion a trimming" blade operated" by i said second sha'f 5'. Anoveredg'e sewing machine having a fram'e" omprismg a base portion with a worn-- suphortingsurface and an upper member mounw said upper member havingintercommunicatm ca vities forming an enclosed 1 chamber and' be ing" separable along a horizontal plar'i'e passi-n through Said base pbTtioli substantially: below" said work supporting surface, means for securing said base"p ortion and member together to form a unitary structureja rock shaft' carrie by the upper section of said frame"and disposed at-least inpart below said work supporti-ng sur face; edge trimming meanscarriedby"saidrock shaft and operating upon said vvork subs'tantially," nori naL-to the plane-0f said work supporting surface; a needle-carryi g membermountsd insaidupper member, a plurality of lo'opers and opm-irating" devices therefor mounted in said base portion, -a shaft in said base-portion '"for' driving said operating devices, a shaft in said upper member for operatingsaidneedle' carrying mam ber; and-connections between said shafts within" said-= chamber for coordinating the operation" thereof! 6'; An overedge sewing machine having a frame' comprising a base portion afwork supporting surface and "an uppefmemb'er 'moun't' ed on" said base portion;,' saidbaseportio'n and" said upper member having in'terc'ommunicatin'g-"- cavities forming an enclosed chamber and being se'p'arable alonga horizontal 1an'e= passing through said base portion substantially below said work supporting surfa xze, means'for secur ing saidv base p'ortiomand' member' together to ,base portion for driving said" operating devices;

a shaft :in saiduppermember' for operating safdf needle-carryingmember, a seoond shafv'imsai upper member' dispos'ed" at least in part bel said work" supporting Y surface; a movable wo ik a Ii stationary trimmingblade mounted on said base portion an'd cooperating with saidmova bl'e' blade :to trim-"the :Work; andconnection's be tween said shafts" within said chamber for 1 co ordinating theoperation thereof:

'7; overe'dge'" sewing machinehavinga frame comprising' aibase portion with a worksupporting surfac'e and an upper member mount ed on said base portion, said base portion and said upper member having interoommunicating cavities forming an enclosed chamber and being separable along a horizontal plane passing through said base portion substantially below said work supporting surface, means for securing said base portion and member together to form a unitary structure, a rock shaft carried by the upper section of said frame and disposed at least in part below said work supporting surface, edge trimming means carried by said rock shaft and operating upon said work substantially normal to the plane of said work supporting surface, a needle carrying member mounted in said upper member, a plurality of loopers and operating devices therefor mounted in said base portion, a shaft in said base portion for driving said operating devices, a rotary shaft in said upper member for operating said needle carrying member, and gearing interconnecting said shafts within said chamber for coordinating the operation thereof 8. An overedge sewing machine having a frame comprising a base portion with a work supporting surface and an upper member mounted on said base portion, said base portion and said upper member having intercommunicating cavities forming an enclosed chamber and being separable along a horizontal plane passing through said base portion substantially below said work supporting surface, means for securing said base portion and member together to form a unitary structure, a reciprocatory needle bar mounted in said upper member and carrying a needle at its lower end, said needle bar having its axis inclined at an acute angle to the vertical, means for reciprocating said bar to carry the point of the needle from a position above to a position below the work supporting surface, complementary stitch forming elements carried by said base portion of the frame and arranged for movement in parallel planes, one of said elements being arranged to cooperate with said needle below the work supporting surface, the other of said elements being arranged to cooperate with said needle above said surface, and said elements being arranged to cooperate with each other at a point adjacent said surface to form overedge stitches, means including a rock shaft mounted in said upper member for trimming the edge of the work in advance of the point of stitch formation, and means including a plurality of rotary shafts mounted in said base portion and said upper member, respectively, for operating said trimming means, said needle bar reciprocating means and said complementary stitch forming elements.

9. An overedge sewing machine having work performing devices including a needle carrier having a needle movable back and forth through the work, an under edge stitch forming element, an overedge stitch forming element, work feeding devices and edge trimming means, and having at least one rotary shaft and connections therefrom for operating said work performing devices, which comprises a frame for supporting said work performing devices, said shaft and said connections, said frame having a lower section providing a work supporting surface and an upper section connected with said lower section, said lower section being adapted for connection alternatively with an upper section of different form having a needle carrier and operating connections therefor of a different character, said sections being separable along a horizontal plane substantially below said work supporting surface and having intercommunicating cavities providing an oil-tight chamber enclosing a major portion of said shaft and said connections, said connections comprising a rock shaft carried by said upper section and having its axis substantially in the plane of said work supporting surface for operating said trimming means, and said rotary shaft having a first portion interconnected with said needle carrier and having another portion spaced longitudinally from said first portion adapted for interconnection with the needle carrier of said different form of upper section.

10. An overedge sewing machine having work performing devices including a needle carrier having a needle movable back and forth through the work, an under edge stitch forming element, an overedge stitch forming element, work feeding devices and edge trimming means, and having at least one rotary shaft and connections therefrom for operating said work performing devices, which comprises a frame for supporting said work performing devices, said shaft and said connections, said frame having a lower section providing a work supporting surface and an upper section connected with said lower section, said lower section being adapted for connection alternatively with an upper section of different form having a needle carrier and operating connections therefor of a different character, said sections being separable along a horizontal plane substantially below said work supporting surface and having intercommunicatlng cavities providing an oil-tight chamber enclosing a major portion of said shaft and said connections, said connections comprising a rock shaft carried by said upper section and having its axis substantially in the plane of said work supporting surface for operating said trimming means, and said rotary shaft having eccentric and concentric portions spaced longitudinally thereof within said chamber, one of said portions being interconnected with said needle carrier and the other of said portions being adapted for interconnection with the needle carrier of said different form of upper section.

NED L. WALLENBERG. ALBERT M. SCHWEDA.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,050,784 Christensen Aug. 1'1, 1.936 2,234,295 Waldman et a1. Mar. 11, 1941 2,238,796 Knaus Apr. 15, 1941 2,360,048 Christensen Oct. 10, 1944 

